US4848072A - Method for producing spun yarns - Google Patents

Method for producing spun yarns Download PDF

Info

Publication number
US4848072A
US4848072A US07/166,196 US16619688A US4848072A US 4848072 A US4848072 A US 4848072A US 16619688 A US16619688 A US 16619688A US 4848072 A US4848072 A US 4848072A
Authority
US
United States
Prior art keywords
yarn
sliver
staple fiber
running path
additional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/166,196
Other languages
English (en)
Inventor
Shoji Sakai
Akio Matsushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Assigned to MURATA KIKAI KABUSHIKI KAISHA reassignment MURATA KIKAI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MATSUSHIMA, AKIO, SAKAI, SHOJI
Application granted granted Critical
Publication of US4848072A publication Critical patent/US4848072A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn

Definitions

  • the present invention relates to a method for producing spun yarns including an additional yarn.
  • a method for producing a spun yarn from staple fiber sliver by supplying an additional yarn of a different nature to the staple fiber sliver while drafting same, and imparting twist thereto by the use of an air injection nozzle, characterized in that the method comprises: starting supply of the additional yarn after arrival of the staple fiber sliver at the air injection nozzle; and starting supply of compressed air for feeding the yarn to the staple fiber sliver after releasing clamp of the yarn.
  • sliver of staple fiber On starting production of a spun yarn, for example, on starting knotting, firstly sliver of staple fiber is fed to a drafting mechanism, and, after the staple fiber sliver past the drafting mechanism has reached an air injection nozzle, clamp of the additional yarn is released and compressed air is supplied to start supply of the yarn.
  • the staple fiber sliver When starting supply of the additional yarn, the staple fiber sliver is already running along its path of travel including the drafting mechanism and the air injection nozzle, so that the leading end of the additional yarn is securely entwined around the staple fiber sliver and thereby led into the air injection nozzle.
  • FIG. 1 is a schematic front view of an example of spun yarn producing apparatus, employed for carrying out the method of the invention
  • FIG. 2 is a fragmentary front view showing on an enlarged scale part of a draft mechanism
  • FIG. 3 is a plan view of the same mechanism
  • FIG. 4 is a perspective view showing the spinning condition of a staple fiber sliver which has been led into an air injection nozzle past the draft mechanism;
  • FIG. 5 is a partly sectioned front view of a feed stop mechanism for the additional thread
  • FIG. 6 is a side view of the same mechanism
  • FIG. 7 is a partly sectioned front view of a yarn cutter/gripper
  • FIG. 8 is a side view of movable members
  • FIG. 9 is a schematic illustration of a drive mechanism for a solenoid rod
  • FIG. 10 is a fragmentary front view of a spun yarn
  • FIG. 11 is a timing chart in the initial stage of a spun yarn manufacturing process.
  • the spun yarn producing apparatus 1 includes an additional yarn feeder on a pneumatic spinning machine, and has its major components and control mechanism arranged as schematically shown in FIG. 1.
  • the pneumatic spinning machine has a spinning unit U located along a path of staple fiber sliver, including a drafting mechanism 3 and an air injection nozzle.
  • the draft mechanism 3 draws non-twisted staple fiber sliver to a predetermined thickness, and includes paired back rollers 5a and 5b, middle rollers 7a and 7b with aprons 6a and 6b, and paired front rollers 8a and 8b.
  • air injection nozzle 4 is internally provided with first and second nozzles 9 and 10 which are located successively in that order in the travel direction of the staple fiber sliver 2 to send out compressed air streams 11 and 12 toward the staple fiber sliver as shown in FIG. 4.
  • Located below the apron 6a between the front roller 8a and middle roller 7a is an outlet end 15 of a yarn guide 14 which supplies to the staple fiber sliver 2 a filamental finished yarn 13 of fiber different from the staple fiber sliver, for example, a false twist yarn of polyester filaments.
  • a filamental finished yarn is employed as an additional yarn different from the staple fiber sliver, it is shown for the sake of convenience and not for any limitative reason.
  • a yarn feed stopper 16 for the filamental finished yarn 13 includes a yarn feed mechanism 18 which is arranged to positively send out a finished yarn 13 withdrawn from a feed yarn package P upon start of the yarn feed, a yarn cutting/gripping mechanism 19 for stopping feed of the finished yarn 13 at the time of yarn breakage in the spinning section, namely, in the draft mechanism 3 or air injection nozzle 4 or at the time of full package, and a pipe 20 for guiding the finished yarn 13 to a predetermined feed position of the draft mechanism 3.
  • the yarn feed mechanism 18 includes as its major components a compressed air nozzle 22 which is formed in the center bore 21 of the pipe 20 slantingly toward the path of travel of the yarn, a compressed air feed pipe 23 for supplying compressed air to the air nozzle 22, and an electromagnetic valve 24. Compressed air is spurted into the air nozzle 22 through a part 17 which is formed in a bracket 25 thereby positively sending to the draft mechanism 3 the leading end of the yarn which has been withdrawn from the feed package P.
  • the cutting/gripping mechanism 19 for the finished yarn 13 is located in a position ensuing the pipe 20.
  • the yarn cutting/gripping mechanism 19 is constituted by a couple of movable members 26 and 27, a fixed member 28 provided between the movable members 26 and 27, and a drive mechanism 29 for the movable members 26 and 27.
  • the movable and fixed members 26 to 28 are provided with holes 31 to 32, respectively, which form an open thread passage in normal travelling condition of the yarn. As shown in FIG. 7, they are supported in positions in alignment with a hole 34 provided in a frame 33, a center hole 36 provided in a pressing bush 35 of the movable member and a center hole 38 of the pipe 37 at a joint portion.
  • the above-mentioned movable members 26 and 27 are rotatably supported by a shaft 39, and a pin 40 is connected between them so that they can be turned integrally with each other.
  • the fixed member 28 is supported on the shaft 39 as shown in FIGS. 6 and 7, and fixedly connected at one part to the frame 33 by a pin 41.
  • a cutter is formed by an end face of one of the movable members 26 and 27, namely, of the movable member 26 on the side of the draft mechanism 3 and a contacting surface 42 on the end face of the fixed member 28.
  • a yarn clamper is formed by the other movable member, namely, the movable member 27 on the side of the yarn feed package P, a contacting surface 43a on the other end face of the fixed member 28 and a contacting surface 43b of the movable member 27 and the frame 33. Accordingly, as shown in FIG.
  • the finished yarn 13 which is running through the pipe 20 as shown in FIG. 5 is cut by the contacting surface 42 between the movable and fixed members 26 and 28 and clamped by the contacting surfaces 43a and 43b between two of the fixed member 28, movable member 27 and frame 33.
  • the slippery filamental finished yarn 13 is gripped at two different positions by secure clamps of the contacting surfaces 43a and 43b while the yarn end on the feeding side is retained by the cutting/gripping mechanism 19, in preparation for restart of yarn feed.
  • the holes 30 and 36 of the movable member 26 and presser bush 35 are provided with chamfered edges which are diverged toward each other not to clamp the yarn.
  • the movable members 26 and 27 are provided on the opposite sides of the fixed member 28 as shown in FIG. 7, but it is of course possible to employ an arrangement where the outer members 26 and 27 are fixed and the intermediate member 28 is movable.
  • a pin 44 is provided on a lever 46 which is pivotally supported on a fixed shaft 45, for turning the movable member 26 clockwise about the shaft 39 in FIG. 6 by engagement with the pin 40 of the movable member 26.
  • Connected to the lever 46 is one end of a rod 47 the other end of which is fixed through a joint bracket 49 to a solenoid rod 48 which is actuated by the above-mentioned yarn cut-off signal.
  • the solenoid rod 48 is moved in the direction of arrow 50 by the operation which will be described hereinlater, the rod 47 is pushed in the direction of arrow 51, turning the movable member 26 about the shaft 39 through the lever 46 and pin 44.
  • Indicated at 52 is a stopper for the movable member. Namely, it determines the position of the movable member 26 when the latter is turned into the position 26a of two-dot chain line in FIG. 8.
  • a cylinder 53 is provided for returning the movable member 26 to the initial position, i.e., to the yarn feeding position.
  • a piston rod 54 of th cylinder 53 is protruded from the position shown in FIG. 6, it is abutted against the pin 40a of the movable members 26 and 27 indicated by two-dot chain line in FIG. 8, pushing the pin 40a to turn the movable members 26 and 27 counterclockwise about the shaft 39 for return to the respective initial positions.
  • Designated at 55 is a stopper for determining the positions of the movable members in the yarn feed position.
  • FIG. 9 there is schematically shown an operating mechanism for the above-mentioned solenoid rod 48. More specifically, indicated at 56 is a yarn clearer which serves to detect defects in the spinning yarn such as thick portions, thin portions, slabs and the like, turning off the solenoid 57 in response to a detection signal from the yarn clearer 56.
  • a yarn clearer which serves to detect defects in the spinning yarn such as thick portions, thin portions, slabs and the like, turning off the solenoid 57 in response to a detection signal from the yarn clearer 56.
  • the solenoid rod 48 is connected to an operating lever 58 which is biased by a spring 59 to turn counterclockwise about a shaft 60, so that the solenoid rod 48 is moved in the direction of arrow 61, and a ratchet wheel 62 for the back roller of the draft mechanism 3 is forcibly stopped by a stopper 63 to stop supply of the staple fiber sliver 2 to the back roller, while turning the movable members 26 and 27 to stop supply of the filamental finished yarn 13 and actuate a cutter 75 to cut the spun yarn 73.
  • the feed stop release mechanism includes a microswitch 65 which is located in the locus of clockwise rotation of the above-mentioned operating lever 58 and which is connected to a feed control mechanism 64 for the filamental finished yarn and to a clutch of the back rollers, and a push button 62 which is depressed to rotate the operating lever 58 clockwise thereby to turn on the switch 65.
  • Feed control mechanism 64 for the filamental finished yarn 13 controls supply of compressed air to the feed stop mechanism 16, and includes a first solenoid valve 68 located between the compressed air feed pipe 23 and a compressed air source 67, and a second solenoid valve 69 located between the compressed air source 67 and the cylinder 53, controlling supply of compressed air by opening and closing these two solenoid valves 68 and 69. Further, the feed control mechanism 64 is also connected to a microswitch 70 which is located in the path of travel of the filamental finished yarn 13 to detect termination, breakage and feed error of the filamental finished yarn 13.
  • a knotter 71 runs to the spindle in stand-by state to start a knotting operation.
  • the movable members 26 and 27 of the yarn cutting/gripping mechanism 19 are turned by rotation of the action lever 46 to clamp the filamental finished yarn 13, and the ratchet wheel 62 for the back roller of the draft mechanism 3 is forcibly stopped to suspend the feed of the staple fiber sliver 2.
  • the operating button 65 is switched on and simultaneously the operating lever 48 is turned clockwise in FIG. 1, pulling the solenoid rod 48 downwardly in the same figure and releasing the ratchet wheel 62 for the back rollers of the draft mechanism 3 to rotate the back roller to feed the staple fiber sliver to the draft mechanism 3. It takes about 15 seconds for the leading end of the staple fiber sliver to reach the air injection nozzle 4 past the draft mechanism 3.
  • the feed control mechanism 64 for the filamental finished yarn 13 opens the second solenoid valve 69 about one second after the restart of the back rollers to supply compressed air to the yarn cutting/gripping mechanism 19, turning the movable members 26 and 27 to release the clamp on the filamental finished yarn 13. Further, the first solenoid valve 68 is opened about 0.1 to 0.2 second after opening the second solenoid valve 69 to send compressed air to the yarn feeder 18 for about 2 seconds.
  • FIG. 11 is a timing chart of the operations from start of knotting to injection of compressed air for feed of the filamental finished yarn.
  • FIG. 10 illustrates part of a spun yarn produced by the method of the present invention.
  • the feed of the additional yarn is started at a time point after arrival of the stable fiber sliver at an air injection nozzle and after release of clamp, thereby securely entwining the additional yarn with the staple fiber sliver and ensuring smooth operation by eliminating the troubles which would otherwise be encountered in the production of spun yarns of that sort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US07/166,196 1987-03-16 1988-03-10 Method for producing spun yarns Expired - Lifetime US4848072A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62060406A JPH0655970B2 (ja) 1987-03-16 1987-03-16 紡績糸の製造方法
JP62-60406 1987-03-16

Publications (1)

Publication Number Publication Date
US4848072A true US4848072A (en) 1989-07-18

Family

ID=13141264

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/166,196 Expired - Lifetime US4848072A (en) 1987-03-16 1988-03-10 Method for producing spun yarns

Country Status (3)

Country Link
US (1) US4848072A (enrdf_load_stackoverflow)
JP (1) JPH0655970B2 (enrdf_load_stackoverflow)
DE (1) DE3808815A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997006296A1 (en) * 1995-08-09 1997-02-20 Prospin Industries, Inc. Method and apparatus for automatically removing an impurity from spun filament yarn and staple fibers
EP1609751A3 (en) * 2004-06-23 2006-05-31 Murata Kikai Kabushiki Kaisha Apparatus for clamping and cutting elastic yarn
US20060191253A1 (en) * 2005-02-06 2006-08-31 Murata Kikai Kabushiki Kaisha Core yarn manufacturing apparatus
US20090044510A1 (en) * 2005-05-16 2009-02-19 Harutoshi Sawada Core fiber detecting method and device in core yarn spinning
US20190257007A1 (en) * 2018-02-21 2019-08-22 Maschinenfabrik Rieter Ag Method for operating a spinning machine of a rotor spinning machine, and spinning machine of a rotor spinning machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305540A (en) * 1919-06-03 Roving-holder
US3822543A (en) * 1971-07-12 1974-07-09 Toray Industries Spun-like yarn and method of manufacturing same
US3851455A (en) * 1971-09-13 1974-12-03 Inst Wlokiennictwa Method for manufacturing yarn from natural and chemical fibers and a device for carrying out the method
US4051756A (en) * 1974-02-20 1977-10-04 Zellweger, Ltd. Cutting arrangement
US4253297A (en) * 1977-03-31 1981-03-03 Centralny Osrodek Badawczorozwojowy Maszyn Wlokienniczych "Polmatex-Cenaro" Method and apparatus for the production of core yarn

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61186541A (ja) * 1985-02-08 1986-08-20 村田機械株式会社 紡績糸
JPS63112727A (ja) * 1986-10-23 1988-05-17 Murata Mach Ltd 紡積糸の製造装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305540A (en) * 1919-06-03 Roving-holder
US3822543A (en) * 1971-07-12 1974-07-09 Toray Industries Spun-like yarn and method of manufacturing same
US3851455A (en) * 1971-09-13 1974-12-03 Inst Wlokiennictwa Method for manufacturing yarn from natural and chemical fibers and a device for carrying out the method
US4051756A (en) * 1974-02-20 1977-10-04 Zellweger, Ltd. Cutting arrangement
US4253297A (en) * 1977-03-31 1981-03-03 Centralny Osrodek Badawczorozwojowy Maszyn Wlokienniczych "Polmatex-Cenaro" Method and apparatus for the production of core yarn

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997006296A1 (en) * 1995-08-09 1997-02-20 Prospin Industries, Inc. Method and apparatus for automatically removing an impurity from spun filament yarn and staple fibers
US5619848A (en) * 1995-08-09 1997-04-15 Prospin Industries, Inc. Method and apparatus for automatically removing an imperfection from spun filament yarn and staple fibers
EP1609751A3 (en) * 2004-06-23 2006-05-31 Murata Kikai Kabushiki Kaisha Apparatus for clamping and cutting elastic yarn
US20060191253A1 (en) * 2005-02-06 2006-08-31 Murata Kikai Kabushiki Kaisha Core yarn manufacturing apparatus
US20090044510A1 (en) * 2005-05-16 2009-02-19 Harutoshi Sawada Core fiber detecting method and device in core yarn spinning
US7770373B2 (en) * 2005-05-16 2010-08-10 Murata Kikai Kabushiki Kaisha Core fiber detecting method and device in core yarn spinning
US7437868B2 (en) * 2005-05-23 2008-10-21 Murata Kikai Kabushiki Kaisha Core yarn manufacturing apparatus
EP1726694A3 (en) * 2005-05-23 2009-07-22 Murata Kikai Kabushiki Kaisha Core yarn manufacturing apparatus
US20190257007A1 (en) * 2018-02-21 2019-08-22 Maschinenfabrik Rieter Ag Method for operating a spinning machine of a rotor spinning machine, and spinning machine of a rotor spinning machine
US11028503B2 (en) * 2018-02-21 2021-06-08 Maschinenfabrik Rieter Ag Method for operating a spinning machine of a rotor spinning machine, and spinning machine of a rotor spinning machine

Also Published As

Publication number Publication date
JPH0655970B2 (ja) 1994-07-27
JPS63227818A (ja) 1988-09-22
DE3808815C2 (enrdf_load_stackoverflow) 1990-07-05
DE3808815A1 (de) 1988-10-06

Similar Documents

Publication Publication Date Title
JPH06212519A (ja) オープンエンド型紡績装置の糸つぎ方法および装置
US4170101A (en) Method and apparatus for piecing an entwined yarn
US4445317A (en) Splicing method for spun yarns
EP1584595A1 (en) Yarn joining device and handy splicer
US4555899A (en) Spun yarn splicing device
US4419859A (en) Splicing apparatus for spun yarns
US4481761A (en) Pneumatic yarn splicing method and apparatus
US20020139102A1 (en) Core yarn, and method and device for manufacturing the same
US4848072A (en) Method for producing spun yarns
US4446687A (en) Pneumatic yarn splicing apparatus for splicing core spun yarns
JPH026643A (ja) 加撚用供給ボビンとして使用されるボビン製造のための多数の精紡装置を具備する精紡機
US4494368A (en) Method of preventing irregular untwisting of yarn ends in splicing spun yarns
JP2641439B2 (ja) スプライシング結合部を形成する方法と装置
JPS6055611B2 (ja) 紡績糸の糸継装置
JPH02229231A (ja) 撚糸用供給ボビンの製造装置
US4416110A (en) Splicing apparatus for spun yarns
US4922704A (en) Method and apparatus for introducing a roving into a textile machine drafting frame
JPS63112727A (ja) 紡積糸の製造装置
JPH07125933A (ja) スプライサーの解撚ノズル
GB2063324A (en) Method and apparatus for splicing yarn ends
JPH0229099Y2 (enrdf_load_stackoverflow)
JP2800167B2 (ja) 弾性糸供給装置及び供給方法
JPH07125931A (ja) 合繊糸用スプライサー
JPS623741B2 (enrdf_load_stackoverflow)
JPH0627383B2 (ja) 紡績糸の製造装置等における糸条供給装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: MURATA KIKAI KABUSHIKI KAISHA, 3, MINAMI OCHIAI-CH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:SAKAI, SHOJI;MATSUSHIMA, AKIO;REEL/FRAME:004866/0030

Effective date: 19880303

Owner name: MURATA KIKAI KABUSHIKI KAISHA,JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SAKAI, SHOJI;MATSUSHIMA, AKIO;REEL/FRAME:004866/0030

Effective date: 19880303

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12